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Recent progress in engineering Clostridium autoethanogenum to synthesize the biochemicals and bioco.modities

Synthetic and Systems biotechnology 2024年第1期9卷 19-25页

作者： Sai Wan Mingchi Lai Xinyu Gao Mingxin Zhou Song Yang Qiang Li Fuli Li Lin Xia Yang Tan Qingdao C1 Refinery Engineering Research Center Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao266101ShandongChina CAS Key Laboratory of Quantitative Engineering Biology Shenzhen Institute of Synthetic BiologyShenzhen Institutes of Advanced TechnologyChinese Academy of ScienceShenzhen518055China shenzhen powered carbon biotechnology co. LtdShenzhen518055China School of Life Sciences Qingdao Agricultural UniversityQingdao266109ShandongChina School of Biological Science and Technology University of JinanJinan250022ShandongChina

Excessive mining and utilization fossil fuels has led to drastic environmental co.sequences,which will co.tribute to global warming and cause further climate change with severe co.sequences for the human *** magnitude of these challenges requires several approaches to develop sustainable alternatives for chemicals and fuels *** this co.text,biological processes,mainly microbial fermentation,have gained particular *** example,autotrophic gas-fermenting acetogenic bacteria are capable of co.verting co.co.(2) and H_(2) into biomass and multiple metabolites through Wood-Ljungdahl pathway,which can be exploited for large-scale fermentation processes to sustainably produce bulk biochemicals and biofuels(*** and ethanol)from *** autoethanogenum is one representative of these chemoautotrophic bacteria and co.sidered as the model for the gas ***,the development of synthetic biology toolbox for this strain has enabled us to study and genetically improve their metabolic capability in gas *** this review,we will summarize the recent progress involved in the understanding of physiological mechanism and strain engineering for ***,and provide our perspectives on the future development about the basic biology and engineering biology of this strain.

关键词： Genetic engineering Clostridium autoethanogenum Gas fermentation carbon fixation Biofuel

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carbon source reco.ery from waste sludge reduces greenhouse gas emissions in a pilot-scale industrial wastewater treatment plant

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Environmental Science and Eco.echnology 2023年第2期14卷 106-113页

作者： Qiandi Wang Xiqi Li Wenzong Liu Siyuan Zhai Qiongying Xu Chang'an Huan Shichen Nie Qinghua Ouyang Hongcheng Wang Aijie Wang CAS Key Laboratory of Environmental biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing100085PR China University of Chinese Academy of Sciences Beijing100049PR China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology(Shenzhen)Shenzhen518055PR China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090PR China Shandong Shenshui Hynar Water Environmental Protection co. Ltd.Shandong274000PR China Shenshui Hynar Water Group co. Ltd.Shenzhen518055PR China

carbon cycle regulation and greenhouse gas(GHG)emission abatement within wastewater treatment plants(WWTPs)can theoretically improve ***,however,large amounts of external carbon sources used for deep nitrogen removal and waste sludge disposal aggravate the carbon footprint of most *** this pilot-scale study,co.siderable carbon was preliminarily reco.ered from primary sludge(PS)through short-term(five days)acidogenic fermentation and subsequently utilized on-site for denitrification in a wool processing *** reco.ered sludge-derived carbon sources were excellent electron donors that co.ld be used as additional carbon supplements for co.mercial gluco.e to enhance ***,improvements in carbon and nitrogen flow further co.tributed to GHG emission ***,a 9.1%reduction in sludge volatile solids was achieved from carbon reco.ery,which offset 57.4%of external carbon sources,and the indirect GHG emissions of the target industrial WWTP were reduced by 8.05%.This study demonstrates that optimizing the allocation of carbon mass flow within a WWTP has numerous benefits.

关键词： carbon neutralization Resource reco.ery Anaerobic fermentation Sludge reduction Pilot-scale study

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Increasing the heterologous production of spinosad in Streptomyces albus J1074 by regulating biosynthesis of its polyketide skeleton

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Synthetic and Systems biotechnology 2021年第4期6卷 292-301页

作者： Ziheng An Hui Tao Yong Wang Bingqing Xia Yang Zou Shuai Fu Fang Fang Xiao Sun Renqiong Huang Yao Xia Zixin Deng Ran Liu Tiangang Liu Key Laboratory of co.binatorial Biosynthesis and Drug Disco.ery Ministry of Education and Wuhan University School of Pharmaceutical SciencesWuhan430071PR China CAS Key Laboratory of Quantitative Engineering Biology Shenzhen Institute of Synthetic BiologyShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055PR China Hubei Engineering Laboratory for Synthetic Microbiology Wuhan Institute of BiotechnologyWuhan430075PR China

Spinosyns are natural broad-spectrum biological insecticides with a double glyco.ylated polyketide structure that are produced by aerobic fermentation of the actinomycete,Saccharopolyspora ***,their large-scale overproduction is hindered by poorly understood bottlenecks in optimizing the original strain,and poor adaptability of the heterologous strain to the production of *** this study,we genetically engineered heterologous spinosyn-producer Streptomyces albus J1074 and optimized the fermentation to improve the production of spinosad(spinosyn A and spinosyn D)based on our previous *** systematically investigated the result of overexpressing polyketide synthase genes(spnA,B,C,D,E)using a co.stitutive promoter on the spinosad titer in *** *** supply of polyketide synthase precursors was then increased to further improve spinosad ***,increasing or replacing the carbon source of the culture medium resulted in a final spinosad titer of~70 mg/L,which is the highest titer of spinosad achieved in heterologous Streptomyces *** research provides useful strategies for efficient heterologous production of natural products.

关键词： Spinosyn Spinosad Polyketide Polyketide synthase Heterologous production Streptomyces

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MOF-Transformed In_(2)O_(3-x)@C Nanoco.n Electrocatalyst for Efficient co.(2)Reduction to Hco.H

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Nano-Micro Letters 2022年第10期14卷 219-234页

作者： Chen Qiu Kun Qian Jun Yu Mingzi Sun Shoufu Cao Jinqiang Gao Rongxing Yu Lingzhe Fang Youwei Yao Xiaoqing Lu Tao Li Bolong Huang Shihe Yang Guangdong Key Lab of Nano-Micro Material Research School of Chemical Biology and BiotechnologyPeking University Shenzhen Graduate SchoolShenzhen 518055People’s Republic of China Department of Chemistry and Biochemistry Northern Illinois UniversityDeKalbIL 60115USA Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong SARPeople’s Republic of China School of Materials Science and Engineering China University of PetroleumQingdaoShandong 266580People’s Republic of China shenzhen International Graduate School Tsinghua UniversityShenzhenPeople’s Republic of China X-Ray Science Division and Joint Center for Energy Storage Research Argonne National LaboratoryLemontIL 60439USA Institute of Biomedical Engineering Shenzhen Bay LaboratoryShenzhen 518107People’s Republic of China

For electrochemical co.(2) reduction to Hco.H,an ongoing challenge is to design energy efficient electrocatalysts that can deliver a high Hco.H current density(JHco.H)at a low *** oxide is good Hco.H production catalyst but with low *** this work,we report a unique co.n design of In_(2)O_(3-x)@C nanocatalyst,wherein In_(2)O_(3-x)nanocube as the fine grains dispersed uniformly on the carbon nanorod co.,resulting in the enhanced *** performance is achieved with 84%Faradaic efficiency(FE)and 11 mA cm^(−2)JHco.H at a low potential of−0.4 V versus *** the current density of 100 mA cm^(−2),the applied potential remained stable for more than 120 h with the FE above 90%.Density functional theory calculations reveal that the abundant oxygen vacancy in In_(2)O_(3-x) has exposed more In^(3+) sites with activated electroactivity,which facilitates the formation of Hco.**** X-ray absorp-tion spectrosco.y also co.firms In^(3+) as the active site and the key intermediate of Hco.*during the process of co.(2) reduction to Hco.H.

关键词： co.(2)reduction Indium oxide Formate co.n design Active sites

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Tuning the O–O bond formation pathways of molecular water oxidation catalysts on electrode surfaces via seco.d co.rdination sphere engineering

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Chinese Journal of Catalysis 2021年第3期42卷 460-469页

作者： Qiming Zhuo Shaoqi Zhan Lele Duan Chang Liu Xiujuan Wu Mårten S.G.Ahlquist Fusheng Li Licheng Sun State Key Laboratory of Fine Chemicals Institute of Artificial PhotosynthesisDUT-KTH Joint Education and Research Centre on Molecular DevicesInstitute for Energy Science and TechnologyDalian University of TechnologyDalian 116024LiaoningChina Department of Theoretical Chemistry and Biology School of Engineering Sciences in ChemistryBiotechnology and HealthKTH Royal Institute of TechnologyStockholm 10691Sweden Department of Chemistry and shenzhen Grubbs Institute Southern University of Science and Technology(SUSTech)Shenzhen 518055GuangdongChina Department of Chemistry School of Engineering Sciences in ChemistryBiotechnology and HealthKTH Royal Institute of TechnologyStockholm 10044Sweden

A molecular [Ru(bda)]-type(bda = 2,2’-bipyridine-6,6’-dicarboxylate) water oxidation catalyst with 4-vinylpyridine as the axial ligand(co.plex 1) was immobilized or co.immobilized with 1-(trifluoromethyl)-4-vinylbenzene(3 F) or styrene(St) blocking units on the surface of glassy carbon(GC) electrodes by electrochemical polymerization, in order to prepare the co.responding poly-1@GC, poly-1+P3 F@GC, and poly-1+PSt@GC functional electrodes. Kinetic measurements of the electrode surface reaction revealed that [Ru(bda)] triggers the O–O bond formation via(1) the radical co.pling interaction between the two metallo-oxyl radicals(I2 M) in the homo-co.pling polymer(poly-1), and(2) the water nucleophilic attack(WNA) pathway in poly-1+P3 F and poly-1+PSt co.olymers. The co.parison of the three electrodes revealed that the seco.d co.rdination sphere of the water oxidation catalysts plays vital roles in stabilizing their reaction intermediates, tuning the O–O bond formation pathways and improving the water oxidation reaction kinetics without changing the first co.rdination structures.

关键词： Water oxidation catalyst Seco.d co.rdination sphere Dipole moment O-O bond formation Reaction kinetics

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Regulation of nerve cells using co.ductive nanofibrous scaffolds for co.trolled release of Lycium barbarum polysaccharides and nerve growth factor

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Regenerative Biomaterials 2023年第1期10卷 919-932页

作者： Jing Wang Yuan Liu Minmin Lv Xiaoli Zhao Kwok Fai So Hui Li Mohamed EL-Newehy Hany EL-Hamshary Yosry Morsi Xiumei Mo Research Center for Human Tissues and Organs Degeneration Institute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen518055P.R.China Department of Orthopedics Shanghai Sixth People’s HospitalShanghai201306P.R.China University of Hong Kong-shenzhen Hospital Shenzhen518053P.R.China State Key Laboratory of Brain and co.nitive Sciences The University of Hong KongPokfulamHong KongP.R.China Department of Ophthalmology The University of Hong KongPokfulamHong KongP.R.China Guangdong-Hong Kong-Macao Institute of CNS Regeneration Jinan UniversityGuangzhouP.R.China Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451P.O.Box 2455Saudi Arabia Faculty of Engineering and Industrial Sciences Swinburne University of TechnologyBoroondaraVIC 3122Australia State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineCollege of Biological Science and Medical EngineeringDonghua UniversitySongjiangShanghai201600P.R.China

Currently,more and more patients suffer from peripheral nerve injury due to trauma,tumor and other causes ***-based nerve co.duits are increasingly reco.nized as a potential alternative to nerve autografts for the treatment of peripheral nerve ***,an ideal nerve co.duit must offer topological guidance and biochemical and electrical signal transduction *** this work,aligned co.ductive nanofibrous scaffolds co.prising polylactic-co.glyco.ic acid and multiwalled carbon nanotubes(MWCNTs)were fabricated via co.xial electrospinning,and nerve growth factor(NGF)and Lycium barbarum polysaccharides(LBP)purified from the wolfberry were loaded on the co.e and shell layers of the nanofibers,*** were co.firmed to accelerate long-distance axon regeneration after severe peripheral nerve *** addition,the synergistic promotion of LBP and NGF on nerve cell proliferation and neurite outgrowth was *** were introduced into the aligned fibers to further increase the electrical co.ductivity,which promoted the directional growth and neurite extension of neurons in ***,the co.bination of co.ductive fibrous scaffolds with electrical stimulation that mimics endogenous electric fields significantly promoted the differentiation of PC12 cells and the axon outgrowth of *** on robust cell-induced behaviors,co.ductive co.posite fibers with optimized fiber alignment may be used for the promotion of nerve reco.ery.

关键词： co.ductive nanofibrous scaffold LBP NGF nerve cells electrical stimulation

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The effect of carbon nanotubes on osteogenic functions of adipose-derived mesenchymal stem cells in vitro and bone formation in vivo co.pared with that of nano-hydroxyapatite and the possible mechanism

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Bioactive Materials 2021年第2期6卷 333-345页

作者： Zhipo Du Xinxing Feng Guangxiu Cao Zhending She Rongwei Tan Katerina E.Aifantis Ruihong Zhang Xiaoming Li Department of Orthopedics The Fourth Central Hospital of Baoding CityBaoding072350China Endocrinology and Cardiovascular Disease Centre Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100037China Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education School of Biological Science and Medical EngineeringBeihang UniversityBeijing100083China Beijing Advanced Innovation Center for Biomedical Engineering Beihang UniversityBeijing100083China Guangdong Engineering Research Center of Implantable Medical Polymer Shenzhen Lando Biomaterials Co.Ltd.Shenzhen518107China Department of Mechanical and Aerospace Engineering University of FloridaGainesvilleFL32611USA Department of Research and Teaching The Fourth Central Hospital of Baoding CityBaoding072350China

It has been well reco.nized that the development and use of artificial materials with high osteogenic ability is one of the most promising means to replace bone grafting that has exhibited various negative *** biomimetic features and unique physiochemical properties of nanomaterials play important roles in stimulating cellular functions and guiding tissue *** efficacy degree of some nanomaterials to promote specific tissue formation is still not *** hereby co.paratively studied the osteogenic ability of our treated multiwalled carbon nanotubes(MCNTs)and the main inorganic mineral co.ponent of natural bone,nano-hydroxyapatite(nHA)in the same system,and tried to tell the related *** vitro culture of human adiposederived mesenchymal stem cells(HASCs)on the MCNTs and nHA demonstrated that although there was no significant difference in the cell adhesion amount between on the MCNTs and nHA,the cell attachment strength and proliferation on the MCNTs were *** importantly,the MCNTs co.ld induce osteogenic differentiation of the HASCs better than the nHA,the possible mechanism of which was found to be that the MCNTs co.ld activate Notch involved signaling pathways by co.centrating more proteins,including specific bone-inducing ***,the MCNTs co.ld induce ectopic bone formation in vivo while the nHA co.ld not,which might be because MCNTs co.ld stimulate inducible cells in tissues to form inductive bone better than nHA by co.centrating more proteins including specific bone-inducing ones secreted from M2 ***,MCNTs might be more effective materials for accelerating bone formation even than nHA.

关键词： Multi-walled carbon nanotubes(MCNTs) Bone repair material Protein adsorption Osteogenic differentiation Bone formation

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Current status of greenhouse gas emissions from aquaculture in China

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Water Biology and Security 2022年第3期1卷 10-17页

作者： co.gjun Xu Guohuan Su Kangshun Zhao Xiaoqi Xu Ziqi Li Qiang Hu Ying Xue Jun Xu Institute of Hydrobiology Chinese Academy of SciencesWuhan430072China University of Chinese Academy of Sciences Beijing100049China Center for Advanced Systems Understanding(CASUS) GorlitzGermany Helmholtz-Zentrum Dresden-Rossendorf(HZDR) DresdenGermany Bren School of Environmental Science&Management University of CaliforniaSanta BarbaraSanta BarbaraCAUSA co.lege of Fisheries and Life Science Dalian Ocean UniversityDalian116000China Center for Microalgal biotechnology and Biofuels Institute of HydrobiologyChinese Academy of SciencesWuhan430072China Institute for Advanced Study Shenzhen UniversityShenzhen518060China Key Laboratory for Algal Biology Institute of HydrobiologyChinese Academy of SciencesWuhan430072China State Key Laboratory of Freshwater Eco.ogy and biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan430072China Laboratory of Fisheries Eco.ystem Monitoring and Assessment College of FisheriesOcean University of ChinaQingdao266003China Field Observation and Research Station of Haizhou Bay Fishery Eco.ystem(Ocean University of China) Ministry of EducationQingdao266003China

Aquaculture and mariculture are beco.ing an increasingly important source of food supply in many co.ntries and ***,with the expansion of aquaculture and mariculture co.es increasing emissions of greenhouse gases(GHG)which co.tribute to global warming and climate *** leads the world in aquaculture and mariculture production,but there are no studies that systematically assess China's overall carbon footprint from these *** study quantified GHG emissions from aquaculture and mariculture by four source phases(feed,energy use,nitrous oxide and fertilizers),and then analyzed the carbon footprint of each of these phases for GHG production of nine major species groups over the past ten years to show the spatial distribution of GHG emissions from aquaculture and mariculture in *** results showed that the production of feed materials co.tributed most to the GHG emissions and found that crop energy use,crop land use changes(LUC),fertilizer production,crop nitrous oxide production and rice methane production were the main sources of feed *** total GHG emissions of the nine species groups were 112 Mt(10^(9) kg)co.(2)e,the nine species acco.nting for approximately 86%of aquaculture and mariculture *** emissions of cyprinids had the highest co.tribution at 47%.Spatial analysis based on our study showed Guangdong,Hubei,Jiangsu and Shandong had the highest GHG emissions of all the provinces in this study,and they acco.nted for approximately 46%of all *** regional Gross Domestic Product(GDP)was significantly positively co.related with GHG emissions in every province,with a co.relation co.fficient higher than *** results showed for the first time the relationship between the relative production by species co.position and spatial distribution of GHG emissions from aquaculture and mariculture in *** findings provide the scientific basis for reduction of GHG emissions within a broader co.text of expanding aqu

关键词： Greenhouse gas emissions Aquaculture Mariculture Species group Feed carbon footprint Regional gross domestic product

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双功能Nb-N-C原子分散催化剂用于水系锌-空气电池驱动co.(2)还原

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Science China Materials 2023年第3期66卷 1013-1023页

作者：高三双王天玮靳梦梦张书胜刘倩胡广志杨慧罗俊刘熙俊 Institute for New Energy Materials and Low-carbon Technologies Tianjin Key Lab for Photoelectric Materials&DevicesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China co.lege of Chemistry Zhengzhou UniversityZhengzhou 450000China Institute for Advanced Study Chengdu UniversityChengdu 610106China Institute for Eco.ogical Research and Pollution co.trol of Plateau Lakes School of Eco.ogy and Environmental Science Yunnan UniversityKunming 650504China shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518110China

设计廉价和高效的双功能催化剂应用于co.(2)还原和O_(2)还原反应(co.(2)RR和ORR)是实现碳中和的理想选择.因此,本文研制出铌原子分散固定在氮掺杂有序介孔碳(Nb-N-C)上的双功能co.(2)RR和ORR催化剂用于锌-空气电池(ZAB)自驱动co.(2)RR.... 详细信息

设计廉价和高效的双功能催化剂应用于co.(2)还原和O_(2)还原反应(co.(2)RR和ORR)是实现碳中和的理想选择.因此,本文研制出铌原子分散固定在氮掺杂有序介孔碳(Nb-N-C)上的双功能co.(2)RR和ORR催化剂用于锌-空气电池(ZAB)自驱动co.(2)RR.得益于高铌原子利用率和有序介孔结构,Nb-N-C催化剂展现出高达90%的co.拉第效率,ORR的半波电位活性为0.84 V,ZAB的峰值功率活性为115.6 mW cm-2.此外,采用两个串联的ZABs单元作为自供能co.(2)RR系统的电源,能够连续将C O_(2)转化为C O.该自供能系统前10小时的C O平均产率为3.75μmol h-1mg-1cat.理论计算表明,铌原子分散固定在氮掺杂的碳上形成Nb–N配位键,从而有效地降低co.(2)RR的决速中间体*co.H和ORR的决速中间体*O的生成能垒.

关键词：有序介孔碳配位键还原反应双功能催化剂半波电位原子利用率氮掺杂能垒

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Integration of partially phosphatized bimetal centers into trifunctional catalyst for high-performance hydrogen production and flexible Zn-air battery

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Science China Materials 2022年第5期65卷 1176-1186页

作者： Miaosen Yang Yifan Liu Jiaqiang Sun Shusheng Zhang Xijun Liu Jun Luo School of Chemical Engineering Northeast Electric Power UniversityJilin 132012China Nanchang Institute of Technology Nanchang 330044China co.lege of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China State Key Laboratory of co.l co.version Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China co.lege of Chemistry Zhengzhou UniversityZhengzhou 450000China Institute for New Energy Materials&Low-carbon Technologies and Tianjin Key Lab for Photoelectric Materials&Devices School of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured MaterialsSchool of ResourceEnvironments and MaterialsGuangxi UniversityNanning 530004China

The development of robust and efficient trifunctional catalysts showing excellent oxygen evolution reaction(OER), oxygen reduction reaction(ORR) and hydrogen evolution reaction(HER) kinetics has been ***, we prepared a hybrid iron and co.alt-based metal alloy phosphide on a phosphorus and nitrogen co.doped carbon substrate(Fe co.P/PNC) as a catalyst using a one-step Pregulation method. The catalyst exhibited a positive half-wave potential of 0.86 V versus the reversible hydrogen electrode(RHE) for ORR, and low overpotentials of 350 and 158 m V for OER and HER, respectively, to achieve a current density of10 m A cm^(-2). Density functional theory calculations demonstrated the dominant role of P in both Fe co.phosphide and carbon matrix, which led to the good ORR, OER and HER kinetics. The assembled aqueous and flexible Zn-air batteries with Fe co.P/PNC as the air cathode displayed excellent peak power densities of 195.1 and 90.8 m W cm^(-2), respectively, as well as outstanding charging-discharging performance, long lifetime, and high flexibility. Moreover, the self-powered overall water-splitting cell exhibited a low working voltage of1.71 V to achieve a current density of 10 m A cm^(-2), co.firming its excellent multifunctional OER/ORR/HER activity.

关键词： trifunctional electrocatalyst multi-active sites alloy/phosphide hydrogen production flexible Zn-air battery

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